Be it right or wrong, legal or illegal, I don't know too many people who would shut down a 206 just to shut a back door. I think if we're being honest most would land, frictions on, get out and shut the door, get back in and fly away.
Of course I would never do that as technically in Oz that would be illegal as it is not for the safety of persons in or in the vicinty of the helicopter.
CH